Starting device for internal-combustion engines



"March 8 1927.

s. JENCICK STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed June 11. 1920 2 Sheets-Sheet 1 ATTORNEYS 1,620,102 Ma 8,1927 5. JENCICK STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed June 11. 1920 '2 Sheets-Sh eet 2 l. ATTORNEYS Patented Mar. 8, 1927.

UNITED STATES,

1,620,102 PATENT OFFICE.

STEPHEN JENGICK, F CLEVELAND, OHIO.

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Application filed June 11, 1920. Serial No. 388,195.

having planetary motion around the starting pinion into and out of mesh with the engine gear and the planetary motion of which is produced by the torque or rotating efiect of the starting shaft.

The object of the invention is'to provide improved mechanism for regulating-or controlling the frictional or retarding effect upon the intermediate pinion and cause it to move positively into mesh with the engine gear fOr-the starting operation, to reduce or stop the retarding efi'ect whenfull meshing relation is reached, and then produce the same after a delay beyond the time when the gears have become disengaged so that the parts will be ready for another operation.

A further object of the invention is to provide means for yieldingly holding the intermediate pinion in either of its two positions,

to wit, in or out of mesh with the engine gear; thereby to insure more positive effects andcertainty in operation.

A further object of the invention is to provide a simple form of mechanism for this purpose which can be made and sold at low cost, which can be applied between any forms of starting motor and internal combustion engine, and which is not liable to get out of order; in service. Further objects of the invention are in part obvious and'in part Willappear-more in detail hereinafter.

In the drawings, Fig. 1 represents a side elevation illustrating the invention applied to an internal combustion engine; Fig. 2 is a sectional elevation, on a larger scale, on the line 22, Fig. 4, showing the parts in disengaged orinefl'ective position; Fig. 3 is a similar view showing the parts in driving position;- Fig. 45 is'a sectional elevation on the line 4.4, Fig. 2, looking in the direction of the arrows; Fig. 5 is an end view from the left'in-Fig. Fig. 6 is a sectional view corresponding to Fig. 4, but showing the parts in engaged or driving relation; and Fig. 7 is" a section on theline 7-.7, Fig. 4. p In the drawings, 1 represents the internal combustion engine, which may be of any 6 suitable form and the crank shaft of which, not shown, is connected to drive the usual fly wheel 2 provided with gear teeth 3 forming a relatlvely large gear to which power may be applied for starting the internal combustion engine.

The starting effect may be produced by any suitable power source, the drawings showing for this purpose an electric-motor 4. the shaft 5 of which carries a pinion \6 which may be termed the starting pinion as it is the pinion from which power is. derived for the starting operation.

'Suitablymounted upon a stationary part.

such as upon a portion of the motor frame,

is a stationary frame '7 of hollow ,form having its outer wall 8 shaped to provide a cam surface 9. lhis casing surrounds and incloses the starting pinlon 6. Within ing supplemental casing or frame 10, the side walls 11 of which are provided with openings to receive the bearing portions 12 mounted to turn upon the shaft 5 so that said frame has oscillating motion about the.

axis of the starting motorshaft. In said supplemental frame is sup orted a short shaft 13 on which rotates t e intermediate pinion 14 meshing directly with the teeth of the pinion 6.- The oscillating motion of 00 the intermediate frame produces planetary or rolling motion of the intermediate pinion .14 around the starting pinion 6, this motion being utilized to move said intermediate pinion into andout of mesh with the engine 95 2 gear -3.

On a boss or suitable portion of the intermediate'frame is pivoted at 15, a trigger looking or retarding device 16 having a tooth or toe 17 adapted to enter thespace between two of the teeth of pinion 6. In

normal or inefl'ective position of the parts, i

as shown in Fig. 2, this locking toot h is moved to and held in the locking pos1t1on shown by a suitable yielding device, such as '1 the leaf spring 18 secured to the outsidepf the wall of the intermediate frame. With the parts in this position the intermediate frame and also the intermediate pinion are,-

in efl'ect, locked to the starting pinion 6.

Consequently when the starting motor is operated by connecting it to a source of said casing is mounted a rocking orswing- I 'the parts.

engagement with the teeth of pinion 6..

When full driving relation is established the retarding effect of the trigger, which normally prevents rotation of pinion 14 on its own axis, is relieved and the driving effect of the engine motor becomes fully effective upon the starting gear and hencenpon the internal combustion engine. The torque of the starting motor is effective upon the intermediate pinion. not only to the extent of driving the internal combustion engine, but of also maintaining the intermediate pinion in its meshing relation between the starting pinion and the engine gear. The final result is, of,.course, to start the internal combustion engine under its own power, whereupon. the speed of rotation of the gear 3 is increased beyond its speed due to the effect of the starting motor, and the increased speed of rotation immediately kicks or throws the intermediate pinion out of mesh with the engine gear and returns the frame 10 to its original position.

According to the present invention suitable means is provided for yieldingly holding the frame 10 in either .of its two positions, and for locking the trigger 16 in its unlocked position when it has been moved thereto and holding it in' said unlocked position for a short period of time after the intermediate pinion and. engine gear have been disengaged to avoid the usual. tendency in mechanisms of this kind ofthe intermediate pinion moving back to driving rela tion. The re-application of the retarding effect upon the pinion 14 is governed accord ing to the present invention by centrifugal effect and particularly 1 by a centrifugal effect produced by the starting motor shaft, as the result of which the driving member itself controls the retarding effect;-

As illustrated the stationary casing or frame 8 is provided near its bottom with an opening 21 carried by a leaf spring 22 fastened at 23 to the casing. The inner end of the pin 21 is flattened off angularly on two sides into V form, as illustratedat 24'. The bevel surfaces on the end ofthis pin co-operate with bevel surfaces upon a projection 25 carried by the rocking frame 10. .Fig. 2 shows the normal or ineffective position of The pressure of the spring 22 is exerted upon one of the faces of'projectior .25 and tends to .hold the rockingframe outwardly by the 20 through which extends a pinin normal position, but the torque of the starting, motor will turn said rocking frame and move the projection 25 past the yielding pin 21 so that-the pressure of said-pin is exerted upon the other inclined face of pro- 180131011 25. thereby tending to releasablyhold the rocking frame in its operative position.

26 formed by a bolt threaded into the shaft and provided with a head 27 having rounded or curved inner and outer cam surfaces 28.

Upon said extension bolt is rotatably mount-' ed a small disc or fly wheel 29 provided with clutch connections to the shaft 5. For example, wheel 29 has a clutrh pin 30 adapted to co-operate with head of the bolt 27. The fly wheel is yieldingly urged outwardly or toward the end of. the shaft extension by a. compression sprlng 32. It is provided on its end face wlth a centrifugal governor including a weight 33 attached to a slide 34 having elon f gated slots 35 through which securing bolts 36 are passed into the fly wheel. The slide 34 is provided with cam portions 37 engag ing the inner and outer curved surfaces of the bolt head, and the inner edge of the fly wheel is rounded off, as at 38, to form a' cam surface for co-operationwith the head of a curved or bent latching arm 39 attached to the tooth member 16. The operation is as follows: In the-normal or ineffective position of the parts, to wit, when the starting motor is idle, the parts occupy the position shown in Fig. 2, and the fly wheel 29 is yieldingly pressed spring 32. Said fly wheel lies outwardly beyond the end of arm 39 and'the trigger 16 is in locked engagement with a tooth of the pinion 6; The outward pressure of spring 32 moves the cam memhers 37 along. the curved faces of the bolt head so that the weight 33 is moved inwardly toward the center or axis of the device. As soon as the starting motor begins to turn as the result of current supplied thereto, shaft 5 rotates and through .the clutch members 31, 30 turns with it thefly wheel 29. These clutch members, however,"

V As stated before, the, effect is to rock the the clutch pin 31 on the l or;

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frame 10 and mesh the gears, moving the trigger 16 to unlocked sition. At the same time the centrifugal e ect of the weight 33 throws said weight outwardly and causes the cams 37 to ride along the curved bolt head, moving the fly wheel'29 axially along the shaft to the position shown in Fig. 6.

. In this positionthe free end of the arm 39 abuts the outer cylindrical surface of the fly wheel so that said fly wheel serves as a lock' to prevent the trigger 16 from returnspinning effect has ceased, the fly wheel 29 remains in the position shown in Fig. 4. When said shaft ceases or nearly ceases to rotate, the effect of the spring 32 upon the fly wheel again moves it endwise and returns the weight 33 to its initial position. The fly Wheel 29 thus moves away from the arm 39 so that the spring 18 can again move the trigger to locking engagement with the pinion 6. Locking engagement, however, is produced only when the pinion 6 has come to rest so thatthere will be renewed tendency of said pinion vto again produce meshing relation and subsequent clashing of the gears.

What I claim is:

1. Starting mechanism for operative connection with a gear that is adapted to be driven by an internal combustion motor, coi'nprising a starting shaft carrying a primary driving pinion, an intermediate pinion' adapted to be driven thereby and adapted to move in an orbital path about the said shaft into and out of mesh with the motor gear, a frame" rotatably mounted upon said starting shaft, said intermediate pinion being mounted in said frame, means upon said frame for preventing rotation of said primary pinion,'means for controlling the same, whereby the rotation of said intermediate pinion about its own axis will be retarded to cause orbital movement thereof into mesh ingrelatioh with themotor geaig'and means, 1 nection with a gear that is adapted to be for locking saidframe indifferent positions with respett', to the said startingshaft.

2. Starting mechanism forvoper'a'tive connection with a gear that is adapted tobe driven by an internal combustion motor, comprising a starting shaft carrying aprimary drivmgpinion, an intermediate-pinion adapted to be driven thereby and adapted to move in anorbital path about-the said shaft into and out of mesh with'z the motor gear, a,

frame rotatably mountedupon said starting shaft, said intermediate pnnonlbemg' mounted in said frame, means upoii said frame for preventing rotation of said primary pinion, whereby the rotation of said intermediate pinion about its own axis will be retarded to cause orbital movement thereof into meshing relation with the motor gear, means in the path of said last named means for releasing said primary pinion so as to cause transmission of power through saidpinions, and means for maintaining said primary pinion 1n released condition.

3. Starting mechanisl .for operative con-- nection with a gear that is adapted to be driven by an internal combustion motor, comprising a starting shaft carrying a primary driving pinion, anintermediate pinion adapted to be driven thereby and adapted to move in an orbital path about the said shaft into and out of mesh with the motor gear, a frame rotatably-mounted upon said starting shaft, said intermediate pinion being mounted in saidframe, means upon said frame for preventing rotation of said primarypinion, whereby the rotation of said intermediate .pfinion about its own'axis will be retarded to cause orbital movement thereof into meshing relation with'the motor gear, means in the path of said last named means 'for releasing said primary pinion so as to cause transmission of power through said pinions, and means controlled by operation of said starting shaft for maintaining said primary pinion 1n released condition.

4. Starting mechanism for operative connection with a gear'that is adapted to be driven by an internal combustion motor, comprising a starting shaft carrying a primary driving pinion, an intermediate pinion adapted to be driven thereby and adapted to move in an orbital path about the said shaft into and out of mesh with the motor gear, means for retarding rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation With the gear, a member mounted for longitudinal movement along the axis of said starting shaft, means for releasing said retarding means and means. controlled by operation of said starting shaft for causing said member to move along its axis and maintain said retarding 1 means in released position.

5. Starting mechanism for operative condriven by an internal combustion motor,

comprising a starting shaft carrying a comprising a starting the motor gear, means for retarding rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation with the gear, a member mounted for rotary and longitudinal movement about and along the axis of said starting shaft, means for releasing said retarding means, and centrifugal means upon said member for causing said member to move along its axis and maintain said retarding means in released position.

7. Starting mechanism for operative connection with a gear that is adapted to be driven by an internal combustion motor,

primary driving pinion, an intermediate pinion adapted to be driven thereby and adapted to move in an orbital path about the said shaft into and out of mesh with the motor gear, means for retarding rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation with the gear, a member mountedupon said starting shaft for 1ongitudinal movement along said shaft, means for normally holding said member in engagement with said shaft for rotary movement therewith, means for releasing said retarding means, the operation of said shaft for moving said member along said shaft'out of rotating engagement therewith and into engagement with said retarding means to hold said retarding means in released position.

8. Starting mechanism for operative con nection with a gear that is adapted to be driven by an internal combustion motor, comprising a starting shaft carr ing a primary drivin pinion, an interme iate pinion adapted to be driven thereby and adapted to move in an orbital path about the said shaft into and out of mesh with the motor gear, means for retarding rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation with the gear, a member mounted uponsaid starting shaft for rotary and longitudinal movement about and along said shaft, means for normally holding said member in engagement with said shaft for rotary movement therewlth, means for releasing sald' retarding means, and means shaft carrying a and means controlled by.

means for co-operation with effect disengagement of said clutch and to.

therewith and into engagement with said retarding means to hold said retarding means in released position.

9'. Starting mechanism for operative connection with a gear that is adapted to be driven by an internal combustion motor, comprising a starting shaft carrying a primary driving pinion, an intermediate pinion adapted to be driven thereby and adapted to move in an orbital path about the said shaft into .and out of mesh with the motor gear, means for retarding rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation with the gear, means for releasing said retarding means, a member mounted upon said starting shaft for rotary and longitudinal movement about and along said shaft, cam lneans carried by said shaft,

centrifugal means having co-operative relation with said member, and cam means for moving sald member along said shaft into engagement with said releasing means so as to maintain the same 1n released pos1t1on.

10. Starting mechanism for operative connection with a gear that is adapted to be adapted to be driven thereby and adapted to move in an orbital path about the said shaft into and out of mesh with the motor gear, means for retarding-rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation with the gear, means for releasing said retarding means, a member loosely mounted upon said starting shaft for longitudinal movement along said shaft, a clutch connection between said member and said shaft, means for normally holding said clutch in operative engagement, cam means carried by said shaft, centrifu ally'controlled said'cam to move said member into engagement with said releasing means to hold the same in released position.

11; Starting mechanism for operative connection-with a gear that is adapted to be driven by an internal combustion motor, comprising a starting shaft member carrymg a primary diate pinion adapted to be driven thereby and adapted to move in an orbital path about said shaft member into and out of mesh with the motor gear, means for retarding rotation of said intermediate pinion about its own axis to cause orbital movement thereof into meshing relation with the gear, means for releasing said retarding means, a member loosely mounted upon said driving pinion, an interme,-

starting shaft. member for longitudinal movement along said shaft. member, a clutch connection between said members, means for normally holding said clutch in .o'penative engagement, cam means carried by one of controlled means earned by sald other member 1501 00- said members, centrifugally operation with said cam means to efieet disengagement of said clutch and to vmove said longitudinally 'movable member into en-- l0 gagement with said releasing means to hold the same in released position. i In testimony whereof I afiix m signature.

STEPHEN J NCICK. 

